audio/alsa-plugins: Switch master site to GitHub.

The original distfiles are getting hard to come by for some reason, so
switch to pulling source tarballs directly from GitHub.  Replace
patches that apply to generated files with patches that apply to their
sources.

audio/alsa-plugins/Makefile

@@ -2,10 +2,14 @@
 
 PORTNAME=	alsa-plugins
 PORTVERSION=	1.2.2
-PORTREVISION=	2
+PORTREVISION=	3
+DISTVERSIONPREFIX=	v
 CATEGORIES=	audio
-MASTER_SITES=	ftp://ftp.alsa-project.org/pub/plugins/ \
-		GENTOO
+MASTER_SITES=	GH
+
+USE_GITHUB=	yes
+GH_ACCOUNT=	alsa-project
+GH_PROJECT=	${PORTNAME}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	ALSA compatibility library plugins
@@ -14,7 +18,7 @@ LICENSE=	LGPL21+
 
 LIB_DEPENDS=	libasound.so:audio/alsa-lib
 
-USES=		alias libtool:keepla localbase pkgconfig tar:bzip2
+USES=		alias autoreconf libtool:keepla localbase pkgconfig tar:bzip2
 GNU_CONFIGURE=	yes
 MAKE_ARGS+=	RM="${RM}"
 EXTRA_PATCHES+=	${FILESDIR}/alsa-plugins.patch

audio/alsa-plugins/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1585923260
-SHA256 (alsa-plugins-1.2.2.tar.bz2) = 1c0f06450c928d711719686c9dbece2d480184f36fab11b8f0534cb7b41e337d
-SIZE (alsa-plugins-1.2.2.tar.bz2) = 406494
+TIMESTAMP = 1634083456
+SHA256 (alsa-project-alsa-plugins-v1.2.2_GH0.tar.gz) = 1872622227c474db9db57bf5b6ec91bbef391f9750e9d64d00d05af29f579e1a
+SIZE (alsa-project-alsa-plugins-v1.2.2_GH0.tar.gz) = 121998

audio/alsa-plugins/files/patch-configure

@@ -1,33 +0,0 @@
---- configure.orig	2016-03-31 13:14:07 UTC
-+++ configure
-@@ -12402,21 +12402,22 @@ else
- $as_echo "yes" >&6; }
- 	HAVE_SPEEXDSP="yes"
- fi
-- if test "$HAVE_SPEEXDSP" = "yes"; then
--  HAVE_SPEEXDSP_TRUE=
--  HAVE_SPEEXDSP_FALSE='#'
--else
--  HAVE_SPEEXDSP_TRUE='#'
--  HAVE_SPEEXDSP_FALSE=
--fi
- 
- 
--
- # Check whether --with-speex was given.
- if test "${with_speex+set}" = set; then :
-   withval=$with_speex; PPH=$withval
- else
-   PPH="lib"
-+fi
-+
-+
-+ if test "$HAVE_SPEEXDSP" = "yes" -a "$PPH" != "no"; then
-+  HAVE_SPEEXDSP_TRUE=
-+  HAVE_SPEEXDSP_FALSE='#'
-+else
-+  HAVE_SPEEXDSP_TRUE='#'
-+  HAVE_SPEEXDSP_FALSE=
- fi
- 
- 

audio/alsa-plugins/files/patch-configure.ac

@@ -0,0 +1,17 @@
+--- configure.ac.orig	2020-02-19 09:35:42 UTC
++++ configure.ac
+@@ -145,12 +145,13 @@ AC_ARG_ENABLE([speexdsp],
+ if test "x$enable_speexdsp" != "xno"; then
+   PKG_CHECK_MODULES(speexdsp, [speexdsp >= 1.2rc2], [HAVE_SPEEXDSP="yes"], [HAVE_SPEEXDSP=""])
+ fi
+-AM_CONDITIONAL(HAVE_SPEEXDSP, test "$HAVE_SPEEXDSP" = "yes")
+ 
+ AC_ARG_WITH([speex],
+ 	AS_HELP_STRING([--with-speex={builtin|lib|no}],
+ 		[build speex resampler (built-in code, link with external lib, or no build)]),
+ 	[PPH=$withval], [PPH="lib"])
++
++AM_CONDITIONAL(HAVE_SPEEXDSP, test "$HAVE_SPEEXDSP" = "yes")
+ 
+ USE_LIBSPEEX=""
+ if test "$PPH" = "lib"; then